/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef ARKCORE_MAPMANAGER_H
#define ARKCORE_MAPMANAGER_H

#include "Define.h"
#include <ace/Singleton.h>
#include <ace/Thread_Mutex.h>
#include "Common.h"
#include "Map.h"
#include "GridStates.h"
#include "MapUpdater.h"

class Transport;
struct TransportCreatureProto;

class MapManager {
	friend class ACE_Singleton<MapManager, ACE_Thread_Mutex> ;
	typedef UNORDERED_MAP<uint32, Map*> MapMapType;
	typedef std::vector<bool> InstanceIds;

public:

	Map* CreateMap(uint32, const WorldObject* obj, uint32 instanceId);
	Map const* CreateBaseMap(uint32 id) const {return const_cast<MapManager*>(this)->_createBaseMap(id);}
	Map* FindMap(uint32 mapid, uint32 instanceId = 0) const;

	uint16 GetAreaFlag(uint32 mapid, float x, float y, float z) const
	{
		Map const* m = CreateBaseMap(mapid);
		return m->GetAreaFlag(x, y, z);
	}
	uint32 GetAreaId(uint32 mapid, float x, float y, float z) const
	{
		return Map::GetAreaIdByAreaFlag(GetAreaFlag(mapid, x, y, z), mapid);
	}
	uint32 GetZoneId(uint32 mapid, float x, float y, float z) const
	{
		return Map::GetZoneIdByAreaFlag(GetAreaFlag(mapid, x, y, z), mapid);
	}
	void GetZoneAndAreaId(uint32& zoneid, uint32& areaid, uint32 mapid, float x, float y, float z)
	{
		Map::GetZoneAndAreaIdByAreaFlag(zoneid, areaid, GetAreaFlag(mapid, x, y, z), mapid);
	}

	void Initialize(void);
	void Update(uint32);

	void SetGridCleanUpDelay(uint32 t)
	{
		if (t < MIN_GRID_DELAY)
		i_gridCleanUpDelay = MIN_GRID_DELAY;
		else
		i_gridCleanUpDelay = t;
	}

	void SetMapUpdateInterval(uint32 t)
	{
		if (t > MIN_MAP_UPDATE_DELAY)
		t = MIN_MAP_UPDATE_DELAY;

		i_timer.SetInterval(t);
		i_timer.Reset();
	}

	//void LoadGrid(int mapid, int instId, float x, float y, const WorldObject* obj, bool no_unload = false);
	void UnloadAll();

	static bool ExistMapAndVMap(uint32 mapid, float x, float y);
	static bool IsValidMAP(uint32 mapid, bool startUp);

	static bool IsValidMapCoord(uint32 mapid, float x, float y)
	{
		return IsValidMAP(mapid, false) && Trinity::IsValidMapCoord(x, y);
	}

	static bool IsValidMapCoord(uint32 mapid, float x, float y, float z)
	{
		return IsValidMAP(mapid, false) && Trinity::IsValidMapCoord(x, y, z);
	}

	static bool IsValidMapCoord(uint32 mapid, float x, float y, float z, float o)
	{
		return IsValidMAP(mapid, false) && Trinity::IsValidMapCoord(x, y, z, o);
	}

	static bool IsValidMapCoord(WorldLocation const& loc)
	{
		return IsValidMapCoord(loc.GetMapId(), loc.GetPositionX(), loc.GetPositionY(), loc.GetPositionZ(), loc.GetOrientation());
	}

	// modulos a radian orientation to the range of 0..2PI
	static float NormalizeOrientation(float o)
	{
		// fmod only supports positive numbers. Thus we have
		// to emulate negative numbers
		if (o < 0)
		{
			float mod = o *-1;
			mod = fmod(mod, 2.0f * static_cast<float>(M_PI));
			mod = -mod + 2.0f * static_cast<float>(M_PI);
			return mod;
		}
		return fmod(o, 2.0f * static_cast<float>(M_PI));
	}

	void DoDelayedMovesAndRemoves();

	void LoadTransports();
	void LoadTransportNPCs();

	typedef std::set<Transport *> TransportSet;
	TransportSet m_Transports;

	typedef std::map<uint32, TransportSet> TransportMap;
	TransportMap m_TransportsByMap;

	bool CanPlayerEnter(uint32 mapid, Player* player, bool loginCheck = false);
	void InitializeVisibilityDistanceInfo();

	/* statistics */
	uint32 GetNumInstances();
	uint32 GetNumPlayersInInstances();

	// Instance ID management
	void InitInstanceIds();
	uint32 GenerateInstanceId();
	void RegisterInstanceId(uint32 instanceId);
	void FreeInstanceId(uint32 instanceId);

	uint32 GetNextInstanceId() {return _nextInstanceId;};
	void SetNextInstanceId(uint32 nextInstanceId) {_nextInstanceId = nextInstanceId;};

private:
	// debugging code, should be deleted some day
	void checkAndCorrectGridStatesArray();// just for debugging to find some memory overwrites
	GridState* i_GridStates[MAX_GRID_STATE];// shadow entries to the global array in Map.cpp
	int i_GridStateErrorCount;
private:
	MapManager();
	~MapManager();

	MapManager(const MapManager &);
	MapManager& operator=(const MapManager &);

	Map* _createBaseMap(uint32 id);
	Map* _findMap(uint32 id) const
	{
		MapMapType::const_iterator iter = i_maps.find(id);
		return (iter == i_maps.end() ? NULL : iter->second);
	}

	ACE_Thread_Mutex Lock;
	uint32 i_gridCleanUpDelay;
	MapMapType i_maps;
	IntervalTimer i_timer;

	InstanceIds _instanceIds;
	uint32 _nextInstanceId;
	MapUpdater m_updater;
};
#define sMapMgr ACE_Singleton<MapManager, ACE_Thread_Mutex>::instance()
#endif
